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.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
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.Dd July 9, 2011
.Dt VM_MAP_SYNC 9
.Os
.Sh NAME
.Nm vm_map_sync
.Nd push dirty pages to their pager
.Sh SYNOPSIS
.In sys/param.h
.In vm/vm.h
.In vm/vm_map.h
.Ft int
.Fo vm_map_sync
.Fa "vm_map_t map" "vm_offset_t start" "vm_offset_t end" "boolean_t syncio"
.Fa "boolean_t invalidate"
.Fc
.Sh DESCRIPTION
The
.Fn vm_map_sync
function forces any dirty cached pages in the range
.Fa start
to
.Fa end
within the
.Fa map
to be pushed to their underlying pager.
.Pp
If
.Fa syncio
is TRUE, dirty pages are written synchronously.
.Pp
If
.Fa invalidate
is TRUE, any cached pages are also freed.
.Pp
The range provided must be contiguous, it MUST NOT contain holes.
The range provided MUST NOT contain any sub-map entries.
.Sh RETURN VALUES
The
.Fn vm_map_sync
function returns
.Dv KERN_SUCCESS
if successful.
.Pp
Otherwise,
.Dv KERN_INVALID_ADDRESS
will be returned if the function encountered a sub-map entry;
.Dv KERN_INVALID_ARGUMENT
will be returned if the function encountered a hole in the region provided,
or if an entry could not be found for the given start address.
.Sh SEE ALSO
.Xr vm_map 9
.Sh AUTHORS
This manual page was written by
.An Bruce M Simpson Aq Mt bms@spc.org .
